Stem-winding watch.



No. 822,018. PATENTED MAY 29, 1906. H. ROSAT, FILS. STEM WINDING WATCH. APPLICATION FILED MAY 24, 1905.

Illl IIIIII Inn HENRI ROSAT, FILS, OF LE LOGLE, SWITZERLAND.

STEM-WINDING WATCH- Specification of Letters Patent.

Patented May 29, 1906.

Application filed May 24,1905. Serial No. 262,0i2-

mechanism the members of which are in position for rewinding. Fig. 2 is an elevation showing the parts of the mechanism in position for setting at the time. Fig. 3 is a section on the line A B in Fig. 1. Fig. 4 represents, partially in longitudinal section, a second modification; and Fig. 5 is a detail.

The winding-stem a has bored through it a cylindrical hole, in which is adjustably fitted a spindle, b, which at its upper end is placed under the false stem 0, adjusted in the square hole (1 of the stem a, while the lower end of the spindle bpresses on a rack 6, engaging with a toothed'sector f, pivoted at g and having a shoulder h adapted to engage with a stop '5, which passes through the plate j, through an elongated slot k, and is fixed on a rocking lever Z, pivoted at m beneath the plate. The said rocking lever is provided with a projecting arm n, engaged in a groove 0 of the sliding pinion p, which is adapted to engage either with the winding-pinion or with the wheel for setting the watch to the time.

A spring s tends to kee the sliding pinion constantly in contact wit the pinion 9, so as to keep the teeth of these two parts always in engagement.

A second spring 15 acts under the toothed sector f and tends always on the one. hand to turn the rack e and to move the spindle b and on the other hand to set the sliding pinion in contact with the wheel 1", the shoulder h grating against the stop '11 of the rocking lever On depressing c, as shown in Fig. 1, the.

parts of the mechanism assume the position for re'winding. The shoulder h of the sector f no longer bears against the stop i, this secb, and the shoulder h of this sector acting against the stop 'i on the rocking lever Z oscillates the latter through a fraction of a turn; determining the longitudinal movement of the sliding pinion p, which being no longer in contact with g meshes with the wheel 1" for setting the watch at the time. On pushing 0 again in the direction of the arrow, Fig. 1, the parts of the mechanism return to their original position for rewinding.

The member a can be made to act on the rack e, not only by means of the spindle passing through the hollow stem a, but also, for example, in the manner shown in Fig. 4. In this latter case the winding-stem u itself acts on the rack '0, this stem it having sufiicient longitudinal play and being directly operated by the false stem 00. In this modification the operation of the mechanism is identical with that described above.

In place of a rack the toothed sector operating the rocking lever which controls the sliding pinion can be operated by a different toothed membersuch, for example, as another toothed sector y, pivoted at .5, Fig. 5, and on which acts the lower extremity of a spindle Z, passing through the hollow winding-stem. In this modification the sector 11 might obviously also be actuated by the winding-stem itself, as explained with reference to the construction shown in Fig. 4.

The form and sizes of the parts of the mechanism may vary without departing from the spirit of the invention.

Having now particularly described and ascertained the nature of my said invention and in what manner the same is to be performed, I declare that what I claim is 1. A stem-winding mechanism for watches comprising a winding-pinion provided with a clutch member and a projecting spindle, a

setting-pinion, an intermediate shiftable member slidably and non-rotatively mounted on said spindle and adapted for engagement with said clutch member or settingplnion, a spring-actuated rocking lever holding said intermediate member in engagement with said clutch member, a presser-rod slidably mounted in a bore formed in said spindle, a false stem engaging said rod, a rack engaged by said rod, and a spring-actuated sector meshing with said rack and having a spring of higher tension than the lever, said sector and lever having engaging portions, substantially as described.

2. A stem winding mechanism for watches IIO comprising a winding-pinion provided with a clutch member and a projecting spindle, a setting -pinion, an intermediate shiftable member slidably and non-rotatively mounted on said spindle and adapted for engagement with said clutch member or settingpinion, a spring-actuated rocking lever holding said intermediate member in engagement with said clutch member, a presser-rod slidably mounted in a bore formed in said spindle, a rack engaged by said rod, and a springactuated sector meshing with said rack and having a spring of higher tension than the lever, said sector and lever having engaging portions, substantially as described.

3. A stem-winding mechanism for watches comprising a winding-pinion provided with a clutch member and a projecting spindle, a setting-pinion, an intermediate shiftable HENRI ROSAT, FILs.

l/V tnesses:

ARMAND DERRCLET, PHILIPPE BI'Q'GUIN. 

